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Finding the Fourth Proportional to 68,808.66, 103,227.81 and 21,422.76

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Solution

The fourth proportional to 68,808.66, 103,227.81 and 21,422.76 is: 32,138.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,808.66 : 103,227.81 = 21,422.76 : x
  2. Step 2: Convert to fraction form
    68,808.66/103,227.81 = 21,422.76/x
  3. Step 3: Cross multiply
    68,808.66x = 103,227.81 × 21,422.76
  4. Step 4: Simplify right side
    68,808.66x = 2,211,424,598.96
  5. Step 5: Solve for x
    x = 2,211,424,598.96/68,808.66
  6. Step 6: Final answer
    x = 32,138.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.